noun [集合/集体] 十三；十三岁；十三个
He ran away from home at the age of thirteen. 他十三岁时离家出走
numeral [基数词] 十三
Thirteen is often considered an unlucky number. 十三常被认为是不吉利的数字。
adjective [原级] 十三的；十三个的
During the expedition, they trekked ten to thirteen hours a day. 在探险期间，他们每天都要走十到十三个小时。
- thirteen 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）
- Lesson 2 Thirteen equals one
- Lesson 82 Monster or fish?
- Lesson 2 Thirteen equals one
